This easy peanut butter fudge recipe makes rich, creamy candy with just four ingredients: butter, creamy peanut butter, vanilla extract, and powdered sugar. The mixture takes about 4 minutes in the microwave, then chills in an 8-inch square pan for at least 1 hour, making this a simple homemade treat for holidays, bake sales, parties, and afternoon cravings.
Every bite is smooth, sweet, and packed with classic peanut butter flavor, with a soft, melt-in-your-mouth texture that becomes firmer and easier to slice when you use the full 4 cups of powdered sugar. No candy thermometer or stovetop boiling is needed, so even beginner candy makers can prepare a beautiful batch in approximately 1 hour 15 minutes to 2 hours.
Jump to RecipeWhy You’ll Love This Recipe
There is a lot to like about this peanut butter fudge, beginning with how quickly it comes together. The butter and peanut butter melt in the microwave, powdered sugar transforms the warm mixture into a thick candy base, and the refrigerator does the final setting work.
The flavor is familiar and comforting: buttery, sweet, creamy, and unmistakably peanut buttery. The texture is dense enough to hold its shape while still soft enough to melt pleasantly on the tongue.
This is also a forgiving recipe for busy cooks. There is no need to monitor bubbling sugar, test a candy stage, or wash several pans afterward.
If you are planning a larger dessert tray, pair these squares with peanut butter chocolate chip shortbread for a buttery cookie option that echoes the same favorite flavor.
Ingredients You’ll Need
The ingredient list is short, but each item matters. Choose good-quality creamy peanut butter and measure the powdered sugar carefully for the best texture.
- Butter: Use 1 cup, or 226 grams, of unsalted or salted butter. Either works well; salted butter adds a subtle sweet-salty contrast.
- Creamy peanut butter: Use 1 cup, about 255 to 270 grams. Regular creamy peanut butter is the most reliable choice because it has a stable texture.
- Vanilla extract: One teaspoon adds warmth and rounds out the strong peanut butter flavor.
- Powdered sugar: Use 4 cups, about 450 grams, for fudge that is firm and easy to slice. If you prefer a softer bite, use 3 1/2 cups instead.
You will also need an 8-inch square baking pan, parchment paper or foil, a large microwave-safe bowl, a sturdy spatula, and a sharp knife. Sifting the powdered sugar is helpful if you see lumps, although vigorous stirring can also smooth them out.
For another candy idea with a chocolate-and-cookie combination, keep our easy KitKat fudge in mind for your next batch of homemade treats.
How to Make It Step-by-Step
Step 1: Line an 8-inch square baking pan with parchment paper or foil, leaving an overhang on two opposite sides. The overhang acts as a sling, allowing you to lift the chilled block out without digging into the corners.
Step 2: Add the butter and creamy peanut butter to a large microwave-safe bowl. Microwave the bowl for 2 minutes, then stir thoroughly so the warmer melted portions combine with any thicker pieces.
Step 3: Return the bowl to the microwave for another 1 to 2 minutes. Stop as soon as the mixture is completely melted and smooth; it should be hot but not boiling, since excessive heat can cause the fats to separate.
Step 4: Stir in the vanilla extract while the mixture is warm. Mix slowly but thoroughly so the vanilla spreads throughout the peanut butter and butter base.
Step 5: Add the powdered sugar gradually rather than dumping it in all at once. Stir firmly after each addition until the mixture becomes very thick, smooth, and cohesive; if a few lumps remain, keep stirring or gently knead the mixture with a spatula.
Step 6: Transfer the thick fudge mixture to the lined pan. Press it into the corners and smooth the top with a spatula, the back of a spoon, or a piece of parchment placed over the surface.
Step 7: Refrigerate the pan for at least 1 hour, or until the fudge feels firm when lightly touched. Lift it out using the parchment or foil, place it on a cutting board, and cut it into small squares.
Pro Tips for Smooth Fudge
Temperature control is the most important detail in this microwave method. Butter and peanut butter need to melt completely, but they should not become boiling hot; overheating can cause the mixture to separate and leave the finished fudge oily.
Microwave in short stages once the first 2 minutes are complete. Microwave strength varies, so the extra 1 to 2 minutes should be treated as a range rather than an automatic full 2-minute addition.
Use regular creamy peanut butter instead of very oily natural peanut butter. Natural peanut butter can make the fudge softer or greasy because the oil may not blend into the mixture as consistently.
Powdered sugar controls the final texture. The full 4 cups create a firmer, more sliceable candy, while 3 1/2 cups make a softer fudge that is especially pleasant when served cold.
Press the mixture firmly into the pan so there are no air pockets. A flat, compact surface will give you attractive squares and a consistent bite from edge to edge.
For another peanut butter favorite on your dessert table, try these classic peanut butter blossoms. Their chocolate centers make a lovely contrast to the creamy fudge.
Storage, Serving & Cutting
Chill the fudge thoroughly before cutting, especially if you used the softer 3 1/2-cup powdered sugar option. A cold block is easier to handle and produces straighter edges.
For cleaner cuts, run a sharp knife under hot water, dry it completely, and make one cut. Repeat the warming and drying process before each cut to prevent the blade from dragging through the candy.
Small squares are ideal because this fudge is rich. An 8-inch square pan can be divided into 16 generous pieces or more petite bites for a holiday platter.
Store the pieces in an airtight container in the refrigerator. Place parchment between layers if you are stacking them, and let the fudge sit briefly at room temperature before serving if you prefer a softer texture.
The squares also make thoughtful edible gifts. Arrange them in a lined tin, wrap individual pieces in wax paper, or add them to a mixed candy box with cookies and chocolate treats.
Candy Pairings and Variations
The straightforward recipe is delicious as written, but it can also become the foundation for a varied candy tray. Keep additions modest so the fudge still presses evenly into the pan and slices neatly.
- Sweet and salty: Use salted butter or sprinkle a very small amount of flaky salt over the top before chilling.
- Crunchy texture: Replace creamy peanut butter only if you want visible peanut pieces, understanding that the texture will no longer be perfectly smooth.
- Chocolate pairing: Serve each square beside a chocolate cookie or drizzle the chilled pieces with melted chocolate after cutting.
- Gift box assortment: Include these squares with peanut butter chocolate chip cookies for a coordinated peanut butter dessert collection.
For a larger celebration, the candy pairs beautifully with a tender cake such as this old-fashioned peanut butter cake. The cake provides a soft, sliceable dessert, while the fudge offers compact bites with a denser texture.
When adding toppings, press them lightly into the surface immediately after smoothing the fudge. This helps them stay in place once the candy firms in the refrigerator.
Easy Peanut Butter Fudge Everyone Will Love
Ingredients
Method
- Line an 8-inch square baking pan with parchment paper or foil, leaving enough overhang on two sides to lift out the chilled fudge.
- Place the butter and creamy peanut butter in a large microwave-safe bowl. Microwave for 2 minutes, then stir well.
- Microwave for another 1 to 2 minutes, stopping when the butter and peanut butter are fully melted and smooth. The mixture should be hot but not boiling.
- Stir in the vanilla extract until evenly distributed.
- Gradually add the powdered sugar, mixing firmly after each addition until the fudge becomes thick and smooth.
- Press the mixture evenly into the lined pan, smoothing the top with a spatula or the back of a spoon.
- Refrigerate for at least 1 hour, or until firm. Lift the fudge from the pan using the parchment or foil, then cut into small squares.
Notes
Final Thoughts
This easy peanut butter fudge delivers homemade candy flavor with remarkably little work. Four dependable ingredients, a few minutes in the microwave, and at least an hour of chilling are all you need for smooth, rich squares everyone will recognize and enjoy.
Use 4 cups of powdered sugar when you want firm pieces for gifting and serving, or choose 3 1/2 cups for a softer bite. Keep the melted mixture below a boil, choose regular creamy peanut butter, and use a warm, dry knife for polished cuts.
Once you make a batch, you will have a simple go-to candy for cookie exchanges, holiday tins, potlucks, and last-minute dessert trays. Cut the squares small, chill them well, and watch them disappear.